Correlates and associations between weight suppression and binge eating symptomatology in a population-based sample

Exploring Correlates of Loss of Control Eating in a Nonclinical Sample

Objective

Loss of control (LOC) eating has been directly related to the core aspects of the psychopathology of eating disorders and to different dimensions of emotion and behavior regulation and self-criticism. This study investigates a model representing the interplay between these dimensions to understand LOC eating among a nonclinical sample.

Methods

A total of 341 participants, recruited in a college campus (mean age 23.21, SD = 6.02), completed a set of self-report measures assessing LOC eating, weight suppression, psychopathology of eating disorders, depression, negative urgency, emotion regulation difficulties, and self-criticism. Path analysis modeling tested a hypothesized model with 3 paths for LOC eating as follows: (1) psychopathology of eating disorders; (2) emotion and behavior regulation; and (3) interplay between these paths.

Results

We found goodness-of-fit indexes to our data: χ2 = 17.11, df = 10, Comparative Fit Index (CFI) = 0.99, Tucker-Lewis index (TLI) = 0.98, Root Mean Square Error Approximation (RMSEA) = 0.045, Standardized Root Mean Square Residual (SRMR) = 0.041, suggesting that: (1) participants with higher weight suppression showed higher degrees of the psychopathology of eating disorders, which was linked to higher levels of LOC eating; (2) self-criticism was a mediator between emotion regulation and depression/negative urgency; (3) self-criticism was a mediator between emotion regulation and disorder eating, which was significantly associated with LOC eating via increased negative urgency.

Conclusion

Our model shows that LOC eating occurs for individuals with the psychopathology of higher eating disorders who experience depressive symptoms and act rashly under distress for their inability to cope adequately with negative feelings of self-devaluation. These findings point to the importance of negative self-evaluations and feelings of inadequacy or worthlessness to understand LOC eating among college students.

Associations among weight suppression, self-acceptance, negative body image, and eating disorder behaviors among women with eating disorder symptoms

The present study aimed to clarify existing research that has inconsistently shown that weight suppression (differences between individuals' highest and current body weights) is associated with worse eating disorder (ED) behaviors and negative body image among women with lifetime EDs, by examining whether an understudied client-supported protective factor for ED pathology - self-acceptance - moderates these associations. Currently symptomatic women with lifetime EDs (N = 108) completed measures assessing self-acceptance and ED symptoms via an online survey. Moderated regressions examined whether self-acceptance moderated associations between weight suppression and both body image (weight/shape preoccupation, overvaluation, dissatisfaction) and ED behavior (dietary restraint, compensatory behaviors, binge eating) outcomes. Results indicated that weight suppression was associated with more severe negative body image and dietary restraint, but not compensatory behaviors or binge eating. In contrast, self-acceptance consistently emerged as a protective factor relative to all negative body image and ED behavior indices. This protective effect did not offset apparent risk factor associations between weight suppression, and negative body image and ED behavior outcomes. These results support further assessment of self-acceptance as an understudied protective factor for women's ED symptoms and as a mechanism of change in EDs intervention research. Women's weight suppression should be assessed during ED prevention initiatives.

Lifetime Weight Course as a Phenotypic Marker of Severity and Therapeutic Response in Patients with Eating Disorders

The association between lifetime weight fluctuations and clinical characteristics has been widely studied in populations with eating disorders (ED). However, there is a lack of literature examining the potential role of weight course as a transdiagnostic factor in ED so far. Therefore, the aim of this study is to compare ED severity and treatment outcomes among four specific BMI profiles based on BMI-trajectories across the lifespan: (a) persistent obesity (OB-OB; (n = 74)), (b) obesity in the past but currently in a normal weight range (OB-NW; n = 156), (c) normal weight throughout the lifespan (NW-NW; n = 756), and (d) current obesity but previously at normal weight (NW-OB; n = 314). Lifetime obesity is associated with greater general psychopathology and personality traits such as low persistence and self-directedness, and high reward dependence. Additionally, greater extreme weight changes (NW-OB and OB-NW) were associated with higher psychopathology but not with greater ED severity. Higher dropout rates were found in the OB-OB group. These results shed new light on the BMI trajectory as a transdiagnostic feature playing a pivotal role in the severity and treatment outcome in patients with ED.

Automatic attentional bias toward high-calorie food cues and body shape concerns in individuals with a high level of weight suppression: Preliminary findings

This study aimed to investigate differences in attentional processes in response to food cues and body shape concerns according to an individual's level of weight suppression. Among 470 women in their 20s, nonobese participants (body mass index [BMI] <25 kg/m²) were divided into two groups according to weight history. If the difference between their highest weight ever and current weight was greater than 10%, they were assigned to the high level of weight suppression (H-WS) group (n = 24); if it was less than 5%, they were assigned to the low level of weight suppression (L-WS) group (n = 29). Self-reported body shape concerns and bulimia nervosa symptoms were assessed. Visual attentional processes were recorded using an eye tracker while participants completed a free-viewing task composed of pairs of high- and low-calorie food cues. After controlling for current BMI, the H-WS group reported higher body shape concerns and higher levels of bulimia nervosa symptoms than did the L-WS group. In the free-viewing task, after controlling for current BMI, body shape concerns, and bulimia nervosa symptoms, the H-WS group had a significantly longer dwell time for high-calorie compared with low-calorie food cues than did the L-WS group, and this difference was observed for the first 1000 ms. Compared with individuals with low weight suppression, the vulnerability to bulimia nervosa symptoms observed in individuals with high weight suppression may be associated with a higher automatic approach tendency toward high-calorie foods after adjusting for body shape concerns.

Examining the contribution of weight-bias internalization to the associations between weight suppression and disordered eating in undergraduates

Weight suppression (WS) is consistently, positively associated with eating disorder (ED) symptoms, but variables that contribute to these associations remain understudied. The current study examined weight-bias internalization as a potential contributor to the link between weight suppression (WS) and disordered eating in an undergraduate sample. Men (n = 285) and women (n = 610) completed assessments of weight history, weight-bias internalization, and ED symptoms. Absolute (difference in highest and current BMI) and relative WS (%BMI change) were calculated. Hierarchical linear and count regression models examined whether WS contributed to ED symptoms (restraint, objective binge episodes [OBEs], loss-of-control [LOC] eating, and compensatory exercise) above and beyond weight-bias internalization. Analyses were conducted by gender. After accounting for weight-bias internalization, WS demonstrated unique associations with restraint in men (p = .01) and women (p < .001), and LOC eating frequency in men (p = .02), though effects were weaker relative to weight-bias internalization. Although WS was positively correlated with frequency of OBEs in men and LOC eating in women, these associations were no longer significant when accounting for weight-bias internalization. Weight-bias internalization was positively associated with all measured ED symptoms. Consistent with previous work, gender differences in the relations of WS and ED symptoms emerged. Results suggest weight-bias internalization might contribute to links between WS and ED symptoms, particularly binge behaviors, in non-clinical samples. Future research should explore whether decreasing weight-bias internalization could weaken the association between WS and ED symptoms.

What are you losing it for? Weight suppression motivations in undergraduates

PURPOSE

Accumulating evidence suggests weight suppression (WS) is related to disordered eating and eating disorder (ED) risk in non-clinical samples; however, research to-date has not examined the intentionality of, or motivations for, WS. The purpose of this study was to: (1) qualitatively assess WS motivation in undergraduates, and (2) explore differences in body image and eating behaviors across motivation categories.

METHODS

In the first study, responses from 192 undergraduates were evaluated using inductive content analysis; four primary motivation categories emerged: appearance, functional, sports/military, and unintentional. In a second study, 1033 undergraduates indicated their primary WS motivation, if applicable, and completed body image and eating behavior measures. Separate analyses were run by gender; covariates included current body mass index (BMI) and WS.

RESULTS

Differences in body image and eating behaviors emerged across motivation categories for both men (p < 0.001) and women (p < 0.001). Appearance-motivated WS in men, and appearance and sports/military-motivated WS in women, were related to greater body dissatisfaction, restraint, thin-ideal internalization, and ED risk. Undergraduates with intentional WS demonstrated higher body dissatisfaction and eating pathology than undergraduates with unintentional or no WS (all ps < 0.05).

CONCLUSIONS

Assessing weight history and WS motivations could be a brief, low-cost intervention to improve identification of undergraduates at greatest risk for EDs. This information could be integrated into campus marketing campaigns promoting wellness.

LEVEL OF EVIDENCE

Cross-sectional descriptive study, Level V.

Examining weight suppression as a transdiagnostic factor influencing illness trajectory in bulimic eating disorders

Recent research indicates that weight suppression (WS: defined as the difference between highest lifetime and current weight) prospectively predicts illness trajectory across eating disorders characterized by binge eating, including AN binge-purge subtype (ANbp), bulimia nervosa (BN), and binge eating disorder (BED), collectively referred to as bulimic eating disorders. Through a series of studies, we have developed a model to explain the link between WS and illness trajectory in bulimic eating disorders. Our model posits that WS contributes to reduced circulating leptin, which leads to reduced postprandial glucagon-like peptide 1 (GLP-1) response. Diminished leptin and GLP-1 function contribute to alterations in two reward-related constructs in the Research Domain Criteria (RDoC): reward value/effort and reward satiation. Respectively, these changes increase drive/motivation to consume food and decrease ability for food consumption to lead to a state of satiation/satisfaction. Combined, these alterations increase risk for experiencing large, out-of-control binge-eating episodes. The following review presents evidence that contributed to the development of this model as well as preliminary findings from an on-going project funded to test this model.

Weight suppression and its relation to eating disorder and weight outcomes: a narrative review

Weight suppression (WS) refers to the discrepancy between highest adult weight and current weight, and has been examined as a key construct related to both: eating pathology and weight management. However, despite increasing interest in WS, findings regarding the clinical implications of WS are often conflicting. For instance, WS has been associated with both adaptive and maladaptive outcomes across various populations. Moreover, results regarding the predictive utility of WS within clinical samples have been inconsistent. The current paper aims to provide a narrative review of existing investigation related to WS, highlight gaps in the field's understanding of this construct, and outline recommendations for future study.

Weight Suppression in Eating Disorders: a Research and Conceptual Update

PURPOSE OF REVIEW

Weight suppression, the discrepancy between an individual's highest past weight at adult height and his or her current weight, is related to many characteristics of individuals with eating disorders. This paper reviews research findings from the past 5 years, draws several implications regarding the mechanism underlying these effects, and proposes new approaches to measuring weight suppression.

RECENT FINDINGS

Studies were reviewed under the categories of anorexia nervosa, bulimia nervosa, and mixed or miscellaneous samples, with more studies falling into the last category than in the first two. Recent findings have continued to show that weight suppression is related to a wide variety of biological and behavioral features in both diagnosed and sub-clinical samples. Weight suppression promotes weight gain which is anathema to individuals with eating disorders, putting them in a biobehavioral bind that appears to prolong their disorder. Priorities for future research are to understand the mechanisms underlying the effects of weight suppression, evaluate new ways of defining weight suppression, and study its implications for modifying treatment.

Weight suppression and bulimic syndrome maintenance: Preliminary findings for the mediating role of leptin

OBJECTIVE

Longitudinal studies support a prospective relationship between weight suppression (WS) and bulimic syndrome (BN-S) maintenance. Although biobehavioral mechanisms have been proposed to explain this link, such mechanisms have yet to be identified. Given that weight loss would reduce leptin levels which may influence eating, this study examined whether reduced leptin levels mediate the link between greater WS and longer illness duration.

METHOD

Women (N = 53), ages 18-45 years, were recruited from the community if they met criteria for a BN-S, including either DSM-5 bulimia nervosa (BN; n = 33) or purging disorder (PD: n = 20), and fell within a healthy weight range (18.5-26.5 kg/m² ). Participants completed clinical assessments and provided blood samples to measure circulating leptin.

RESULTS

Significant associations were found among greater WS, lower leptin concentrations, and longer duration of illness. Mediation analyses using bootstrapping procedures indicated all paths were significant and that leptin mediated the link between WS and illness duration. An alternative model in which longer illness duration contributed to leptin, via greater WS, was not supported.

DISCUSSION

Longitudinal research is needed to support temporal associations and explore behavioral mechanisms linking leptin to illness trajectory.

Exploring gender differences in the link between weight suppression and eating pathology

Weight suppression (WS), the difference in one's highest weight (excluding pregnancy) and current weight at current height, is associated with the onset of eating disorders. Previous research has explored the influence of WS in predominantly clinical, female samples. However, the transition to college is a particularly high-risk time for weight gain and the development of eating pathology and men with eating disorders often have higher premorbid weights. This study investigated the associations of WS and dimensions of eating pathology in an undergraduate sample (N=859) and examined the effect of gender. Results demonstrated that higher levels of WS were associated with more dietary restraint (p=0.004) and more frequent purging behaviors (p<0.001); WS was indirectly related to loss-of-control eating through dietary restraint for both men and women (p<0.001). Additionally, men with higher WS were more likely to engage in extreme weight control behaviors, such as vomiting and laxative abuse (p=0.036). Findings suggest that weight history might be especially important to assess in men at risk for disordered eating. This approach might be particularly beneficial with college students due to their heightened risk of eating and weight disturbances.

Associations between weight suppression and dimensions of eating disorder psychopathology in a multisite sample

Evidence suggests that weight suppression, the difference between an individual's highest historical body weight and current body weight, may play a role in the etiology and/or maintenance of eating disorders (EDs), and may also impact ED treatment. However, there are limited findings regarding the association between weight suppression and dimensions of ED psychopathology, particularly in multi-diagnostic ED samples. Participants were 1748 adults (94% female) from five sites with a variety of DSM-IV ED diagnoses who completed the Eating Disorder Questionnaire, a self-report measure of various attitudinal, behavioral, and medical features of EDs. Four factor analytically derived dimensions of ED psychopathology were examined: (a) weight/shape concerns, (b) binge eating/vomiting, (c) exercise/restrictive eating behaviors, and (d) weight control medication use. Hierarchical regression analyses were conducted to examine the unique association of weight suppression with each dimension (controlling for ED diagnosis and BMI), as well as the independent unique associations of three interactions: (a) weight suppression×BMI, (b) weight suppression×ED diagnosis, and (c) BMI×ED diagnosis. Results revealed that weight suppression was uniquely associated with all of the ED psychopathology dimensions except binge eating/vomiting. The weight suppression × BMI interaction was significant only for weight/shape concerns, whereas the weight suppression×ED diagnosis was not significant for any of the dimensions. Significant BMI×ED diagnosis interactions were found for all dimensions except weight/shape concerns. Overall, the current results support the salience of weight suppression across multiple dimensions of ED psychopathology, with the exception of binge eating/vomiting.

Understanding the feasibility of integrating the eating disorders and obesity fields: the beyond obesity and disordered eating in youth (BODY) Study

BACKGROUND

Attention has been devoted to exploring ways to integrate the eating disorders (ED) and obesity (OB) prevention fields. Although research has revealed considerable overlap between the risk factors for ED and those for OB, collaboration between the two fields remains strained. Existing position papers focus mainly on discussions about the lack of collaboration and whether or not the two fields should merge their prevention efforts. However, no empirical study has yet addressed these questions. The beyond obesity and disordered eating in youth (BODY) Study is a qualitative study that sheds light on the relationship between the ED and OB fields.

AIM

Using part of the BODY Study data and findings, this paper aims to further explore the costs and benefits of ED and OB collaboration/integration. Four models, or scenarios, proposed by Neumark-Sztainer to describe the interaction between the ED and OB prevention fields are used as a framework to guide the BODY Study findings' discussion.

METHOD

Based on grounded theory methodology, the BODY Study used in-depth interviews and focus groups as data collection methods. A total of 61 participants took part in the study: 35 researchers/practitioners who work in either ED or OB; and 26 youths (aged 16-26 who attended six focus groups and 12 in-depth interviews).

ANALYSIS

Selected BODY Study themes, relevant to better understanding the four scenarios proposed by Neumark-Sztainer, presented in this paper are: (a) Two camps: understanding the relationship between the ED and OB fields; (b) Consequences for professionals and youths of the existence of two camps; (c) Root causes of the perceived tension: ideology and philosophy, power and knowledge, and gender.

CONCLUSION

Findings from this study mirror existing theoretical papers that look at the relationship between the two fields-including Neumark-Sztainer's scenarios. At the same time, this empirical work further discusses the costs of a possible integration that, even if desirable, does not take into account the root causes of the tension between the two fields (e.g., power imbalance, gender neutrality).